/*
 *  Copyright (c) 2004, The Joust Project
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without 
 *  modification, are permitted provided that the following conditions 
 *  are met:
 *
 *  - Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 *  - Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in 
 *    the documentation and/or other materials provided with the 
 *    distribution. 
 *  - Neither the name of the Joust Project nor the names of its 
 *    contributors may be used to endorse or promote products derived 
 *    from this software without specific prior written permission. 
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
 *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 *  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
 *  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 *  POSSIBILITY OF SUCH DAMAGE.
 *
 *  File created by keith @ Feb 7, 2004
 *
 */

package net.kano.joustsim.oscar.oscar.service.info;

import net.kano.joscar.flapcmd.SnacCommand;
import net.kano.joscar.snac.SnacRequestAdapter;
import net.kano.joscar.snac.SnacRequestTimeoutEvent;
import net.kano.joscar.snac.SnacResponseEvent;
import net.kano.joscar.snaccmd.FullUserInfo;
import net.kano.joscar.snaccmd.InfoData;
import net.kano.joscar.snaccmd.loc.UserInfoCmd;
import net.kano.joustsim.Screenname;

import java.util.Set;

public abstract class UserInfoRequestManager<V> extends InfoRequestManager {
  public UserInfoRequestManager(MutableInfoService service) {
    super(service);
  }

  protected void sendRequest(final Screenname sn) {
    SnacCommand cmd = generateSnacCommand(sn);
    getService().getOscarConnection().sendSnacRequest(cmd,
        new SnacRequestAdapter() {
      private boolean ran = false;

      public void handleResponse(SnacResponseEvent e) {
        SnacCommand snac = e.getSnacCommand();

        if (shouldRunListeners(snac)) {
          synchronized (this) {
            if (ran) return;
            ran = true;
          }

          runListeners(sn, getDesiredValueFromSnac(snac));
        }
      }

      public void handleTimeout(SnacRequestTimeoutEvent event) {
        synchronized (this) {
          if (ran) return;
          ran = true;
        }
        runListeners(sn, null);
      }
    });
  }

  protected boolean shouldRunListeners(SnacCommand snac) {
    return snac instanceof UserInfoCmd;
  }

  private void runListeners(Screenname sn, V value) {
    Set<InfoResponseListener> listeners = clearListeners(sn);
    for (Object listener1 : listeners) {
      InfoResponseListener listener = (InfoResponseListener) listener1;
      callListener(listener, sn, value);
    }
  }

  private V getDesiredValueFromSnac(SnacCommand snac) {
    V value = null;
    if (snac instanceof UserInfoCmd) {
      UserInfoCmd uic = (UserInfoCmd) snac;

      FullUserInfo userInfo = uic.getUserInfo();
      if (userInfo != null) {
        InfoData infodata = uic.getInfoData();
        if (infodata != null) value = getDesiredValue(infodata);
      }
    }
    return value;
  }

  protected abstract SnacCommand generateSnacCommand(Screenname sn);

  protected abstract void callListener(InfoResponseListener listener,
      Screenname sn, V value);

  protected abstract V getDesiredValue(InfoData infodata);
}
